Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/importer/parsers/AnnotationClassifier.java @ 5844:4dd33b86dc61

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Added header to river backend.
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 26 Apr 2013 08:25:41 +0200
parents 5aa05a7a34b7
children 4c3ccf2b0304
rev   line source
5844
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Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.importer.parsers;
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10
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11 import org.w3c.dom.Document;
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12 import org.w3c.dom.NodeList;
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13 import org.w3c.dom.Element;
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14
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15 import javax.xml.xpath.XPathConstants;
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16
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17 import java.util.Map;
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18 import java.util.HashMap;
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19 import java.util.List;
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20 import java.util.ArrayList;
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21
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22 import java.util.regex.Pattern;
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23 import java.util.regex.Matcher;
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24
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25 import org.apache.log4j.Logger;
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26
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27 import org.dive4elements.artifacts.common.utils.XMLUtils;
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28
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29 import org.dive4elements.river.importer.ImportAnnotationType;
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30 import org.dive4elements.river.importer.Importer;
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31
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32 public class AnnotationClassifier
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33 {
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34 private static Logger log = Logger.getLogger(Importer.class);
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35
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36 public static final String TYPES_XPATH =
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37 "/annotation/types/type";
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38
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39 public static final String FILE_PATTERNS_XPATH =
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40 "/annotation/patterns/file";
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41
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42 public static final String DESCRIPTION_PATTERNS_XPATH =
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43 "/annotation/patterns/line";
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44
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45
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46 public static class Pair {
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47
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48 protected Pattern pattern;
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49 protected ImportAnnotationType annType;
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50
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51 public Pair(Pattern pattern, ImportAnnotationType annType) {
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52 this.pattern = pattern;
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53 this.annType = annType;
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54 }
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55
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56 public ImportAnnotationType match(String s) {
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57 Matcher m = pattern.matcher(s);
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58 return m.matches() ? annType : null;
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59 }
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60 } // class Pair
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61
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62
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63 protected Map<String, ImportAnnotationType> types;
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64 protected List<Pair> filePatterns;
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65 protected List<Pair> descPatterns;
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66
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67 protected ImportAnnotationType defaultType;
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68
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69 public AnnotationClassifier() {
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70 }
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71
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72 public AnnotationClassifier(Document rules) {
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73 types = new HashMap<String, ImportAnnotationType>();
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74 filePatterns = new ArrayList<Pair>();
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75 descPatterns = new ArrayList<Pair>();
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76
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77 buildRules(rules);
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78 }
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79
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80 protected void buildRules(Document rules) {
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81 buildTypes(rules);
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82 buildFilePatterns(rules);
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83 buildDescriptionPatterns(rules);
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84 }
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85
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86 protected void buildTypes(Document rules) {
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87
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88 NodeList typeList = (NodeList)XMLUtils.xpath(
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89 rules,
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90 TYPES_XPATH,
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91 XPathConstants.NODESET,
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92 null);
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93
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94 if (typeList == null) {
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95 log.info("no rules found.");
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96 return;
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97 }
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98
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99 for (int i = 0, N = typeList.getLength(); i < N; ++i) {
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100 Element typeElement = (Element)typeList.item(i);
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101 String name = typeElement.getAttribute("name");
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102 if (name.length() == 0) {
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103 log.warn("ANNCLASS: rule has no name");
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104 continue;
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105 }
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106
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107 ImportAnnotationType aic = new ImportAnnotationType(name);
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108
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109 types.put(name, aic);
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110
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111 if (typeElement.getAttribute("default").equals("true")) {
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112 defaultType = aic;
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113 }
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114 }
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115 }
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116
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117 protected void buildFilePatterns(Document rules) {
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118
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119 NodeList patternList = (NodeList)XMLUtils.xpath(
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120 rules,
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121 FILE_PATTERNS_XPATH,
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122 XPathConstants.NODESET,
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123 null);
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124
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125 if (patternList == null) {
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126 log.info("no file patterns found.");
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127 return;
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128 }
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129
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130 for (int i = 0, N = patternList.getLength(); i < N; ++i) {
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131 Element element = (Element)patternList.item(i);
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132 Pair pair = buildPair(element);
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133 if (pair != null) {
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134 filePatterns.add(pair);
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135 }
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136 }
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137 }
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138
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139 protected void buildDescriptionPatterns(Document rules) {
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140
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141 NodeList patternList = (NodeList)XMLUtils.xpath(
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142 rules,
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143 DESCRIPTION_PATTERNS_XPATH,
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144 XPathConstants.NODESET,
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145 null);
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146
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147 if (patternList == null) {
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148 log.info("no line patterns found.");
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149 return;
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150 }
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151
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152 for (int i = 0, N = patternList.getLength(); i < N; ++i) {
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153 Element element = (Element)patternList.item(i);
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154 Pair pair = buildPair(element);
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155 if (pair != null) {
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156 descPatterns.add(pair);
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157 }
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158 }
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159 }
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160
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161 protected Pair buildPair(Element element) {
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162 String pattern = element.getAttribute("pattern");
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163 String type = element.getAttribute("type");
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164
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165 if (pattern.length() == 0) {
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166 log.warn("ANNCLASS: pattern has no 'pattern' attribute.");
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167 return null;
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168 }
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169
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170 if (type.length() == 0) {
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171 log.warn("ANNCLASS: pattern has no 'type' attribute.");
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172 return null;
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173 }
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174
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175 ImportAnnotationType annType = types.get(type);
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176
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177 if (annType == null) {
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178 log.warn("ANNCLASS: pattern has unknown type '" + type + "'");
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179 return null;
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180 }
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181
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182 Pattern p;
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183
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184 try {
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185 p = Pattern.compile(pattern,
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186 Pattern.CASE_INSENSITIVE|Pattern.UNICODE_CASE);
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187 }
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188 catch (IllegalArgumentException iae) {
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189 log.warn("ANNCLASS: pattern '" + pattern + "' is invalid.", iae);
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190 return null;
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191 }
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192
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193 return new Pair(p, annType);
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194 }
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195
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196 public ImportAnnotationType getDefaultType() {
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197 return defaultType;
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198 }
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199
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200 public ImportAnnotationType classifyFile(String filename) {
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201 return classifyFile(filename, null);
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202 }
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203
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204 public ImportAnnotationType classifyFile(
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205 String filename,
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206 ImportAnnotationType def
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207 ) {
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208 if (filename.toLowerCase().endsWith(".km")) {
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209 filename = filename.substring(0, filename.length()-3);
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210 }
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211
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diff changeset
212 for (Pair pair: filePatterns) {
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diff changeset
213 ImportAnnotationType annType = pair.match(filename);
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214 if (annType != null) {
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diff changeset
215 return annType;
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216 }
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217 }
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218
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diff changeset
219 return def;
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220 }
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221
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222 public ImportAnnotationType classifyDescription(String description) {
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223 return classifyDescription(description, null);
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diff changeset
224 }
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225
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226 public ImportAnnotationType classifyDescription(
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diff changeset
227 String description,
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228 ImportAnnotationType def
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229 ) {
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230 for (Pair pair: descPatterns) {
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diff changeset
231 ImportAnnotationType annType = pair.match(description);
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diff changeset
232 if (annType != null) {
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diff changeset
233 return annType;
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diff changeset
234 }
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diff changeset
235 }
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diff changeset
236
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diff changeset
237 return def;
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238 }
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239 }
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240 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org